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REVISION OF MEZIA (MALPIGHIACEAE)

Published online by Cambridge University Press:  23 July 2018

C. Anderson  and
W. R. Anderson
C. Anderson
Affiliation:
University of Michigan Herbarium, 3600 Varsity Drive, Ann Arbor, MI 48108, USA. E-mail: chra@umich.edu
W. R. Anderson
Affiliation:
University of Michigan Herbarium, 3600 Varsity Drive, Ann Arbor, MI 48108, USA. E-mail: chra@umich.edu
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Abstract

The Neotropical genus Mezia (Malpighiaceae) comprises 15 species of lianas (except M. huberi W.R.Anderson, a shrub or small tree). All have multibranched, densely brown-sericeous inflorescences with the ultimate unit a 4-flowered umbel of bilaterally symmetrical flowers. The distinctive pair of large cymbiform bracteoles subtends a rudimentary pedicel and encloses the floral bud. The flowers contain elongate sepals, the lateral four biglandular, yellow petals, the posterior often splotched with red, a heteromorphic androecium, and a tricarpellate gynoecium. The three styles are all free; the posterior pair is lyrate in five species but erect in the others. The samaras have an orbicular to oblate lateral wing and a much smaller dorsal wing; in most species, additional winglets and/or crests are present between the lateral and dorsal wings. Only Mezia mariposa W.R.Anderson has butterfly-shaped samaras lacking additional ornamentation. Four new species are proposed: Mezia andersonii C.E.Anderson, M. bahiana C.E.Anderson, M. fanshawei C.E.Anderson and M. sericea C.E.Anderson. One variety is elevated to species level and provided with a new name, Mezia peruviana C.E.Anderson; a lectotype is chosen for Diplopterys involuta var. ovata Nied. Full descriptions and synonymies are provided, as well as a distribution map. All species are illustrated.

Keywords

Christianella cladelianasMalpighiaceaeMeziaPanamaSouth America
Type
Articles
Information
Edinburgh Journal of Botany , Volume 75 , Issue 3 , November 2018 , pp. 321 - 376
Copyright
Copyright © Trustees of the Royal Botanic Garden Edinburgh (2018) 

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Footnotes

†

Deceased.

References

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